Pump



, 15 barrel, as it is very Patented Aug. 19, 1924.

UNITED STATE-S rm f A orrics.

.ioHN HAHN, or ANGELES, caLiironNIa.

application med .my ai,- ieas. 'sensi No. 6543er.

To all whom t may concern:

Be it known that I, JOHN HAHN, a citizen of the United States, residing at Los Ani geles, in the county of Angeles and State of California, have invented a new and useful Pump, of which the following is a specilication.

4This invention relates to pumps of the type employed in discharging li nids from wells and i'sespecially sei-vceabe in deep water and oil wells.

In many wells a very llne sand present i'n the liquid bein pumped tends to excessive wear o the lun'e'r and working illicu t to prevent the entrance of such sand-.,between the plunger and working barrel.

An object of this invention is toprevent to a great degree the entrance of this sand between the working barrel and plunger.

Another object is to make provision .for discharge of the sand from the pump when said sand accumulates to such a degree as to sand up thepump, as it is generally termed.

A further object is to provide for tightly packing the working barrel within thepump tubing at both ends of said barrelto revent ihe entrance of sand in the space t erebetween, and at the same time permit of ready pulling of the working barrel, y Y

A further object is to provide a pum which may have a main standing valve an an auxiliarystandng valve, the auxi iary. standing valve being omitted in some in` stances, it being used in event of there being,-

a great quantity of gasproduced with the liquid or ineventof the main standing valve boing put out of commission by an accumulation of sand.

Another object is to make provision for withdrawing the inserted part of the pump from the pump tubing without disturbing said tubing.

Another object is to provide for holding the working barrel in place -by a frctional lock.

Another object is to make provision .for holding the plunger straight just above the su working barrel to prevent such wear at the upper end of the working barrel asy would permit of the entrance of a relatively large amount of sund between the working barrel and plunger, thus causing relatively quick deterioration of the pum In the pumping operation it is impossi ile with ordinary yits entire circumference of considerably la'rer diameter than the `valve ball so that sai ball can `freely r'll "to one side of the axis of the valve ca" to plermt of the free owfof 1i uid therct roug I Other o jects and advantages will appear in the subjoined detailed 'desci'i tieni i The accompanying drawingsi-lluetrate the invention:

Figure 1 is' a broken sectional elevation of a pump constructed in accordance with the `provisions of this invention, the upper and lower sections thereof being placed side by side to shorten the view.

Fig. 2 is an enlarged sectional elevation of the middle portion of the upper section of the pump in Figure 1.

. Fig. 3 is an invertedV Vlan section on the line indicated by 3-3, igure 2,

Fig. 4 is an enlargedsectional elevation of the lower portion of the puni omitting `the upper standing valve and sowing an imperforate tubular, seat member on the lowerend of the working-j rrel/in place of .a perforate member as in ig. 1.

Referring to the drawings, pump tubing is indicated at 11 and is constructed in the usual manner of screwthreaded ysections connected by couplings 12. The pump tubing 11 has aperforate section 13, the perorations being indicated at 14.

Within theV lower portion of the pump tubing is a main standing valve cage 15 having a valve `seat 16 for a ball valve 17, the bore or chamber of the valve cage 15 is of substantially greater diameter at all points than the valve ball 17 and the wall of said chamber is curved outwardl and upwardly from the valve seat 16 as indicated at 19, thus ,affording ample clearance around the valve ball so that said valve ball canmove out of axial alinement with the seat to permit ready iiow of liquid through the valve cage. T e curved character of the lower portion of the Walls of the chamber 18 causes the valve ball to instantly roll into the closed position on the seat 16 as soon as the upward flow of liquid throughthe valve cage ceases.

The valve cage is yieldingly supported upon a coil spring 20 which rests upon an internal annular shoulder 21 of the ump tubing, said shoulder in this instance eing formed by the upper end of the tail pipe or anchor 22 of the pump. To prevent sand and liquid reaching the spring 20 and clogging said spring, a bushing 23 forms the inner wall of the chamber 24 in which the spring 20 is housed, the pump tubing forming t e outer wall of said chamber. The bushing 23 is in sliding engagement with the tail pipe 22 and the upper end of said bushing is screw-threaded into the lower end of the valve cage 15 against the valve seat 16 to hold said valve seat in place.

The valve cage 15 constitutes a pump seat-forming member, the upper end of the Valve cage providing a seat 25 for either a perforate tubular member 26 shown in Figure 1 or an imperforate tubular member 27 shown in Fi re 4. The erforations of the tubular member 26 are indicated at 2S and admit fluid, that has entered the perforations 14, to the interior of the tubular member 26 in some instances, or, in other instances, permit the escape of gas that may have entered the tubular member 26 through the valve cage with the liquid that flows upwardly into the tail pipe 22. The seat 25 and lower ends of the members 26, 27 inserted therein are tapered inwardly and downwardly so as to form a leakproof joint between the standing valve and member 26 or '27, as the case may be, and at the same time permit of the member 26 or 27 being readily disconnected from the valve ca e. Preferably the perforate section 13 of t e pump tubing is of considerably greater diameter than the tubular.member 26 so as to form a chamber 29 therebetween.

The tubular member 26 serves to connect the pump seat 25 with an upper or auxiliary standing valve cage 30, the upper end of the member 26 being screw-threaded into the lower end of the valve cage 30 against the valve seat 31 of said cage so as to hold said valve seat in place. Adapted to close u on the valve seat 31 is a valve ball 32. The bore or valve chamber 33 is constructed substantially the same as the valve chamber 18 hereinbefore described and, therefore, further detailed description of the valve chamber 33 is unnecessary. The valve cage 30 is connected by screw-threads with the lower end of a workin barrel 34 in which reciprocates a valve plun er 35.' The lower or intake plunger cage, va ve ball and valve seat are indicated at 36, 37 and 38, respectively. The upper o'r discharge cage, valve ball and valve scat are indicated at 39, 40 and 4l, respectively. The valve chambers 42 and 43 of thc lower and upper plunger valve cages are constructed substantially the same as the valve chamber 18 hereinbefore described so as to permit of the ready passage of liquid through the valve ca s and immediate seating of the valve bals 37, 40 upon the beginning of the u stroke of the lunger. In Flg. 4 the tu ular member 27 1s directly connected by screw threads with the lower end of the working barrel 34.

The upper end of the working barrel 34 is connected by screw-threads to a guide 44 of less internal and external diameter than the working barrel, and the upper portion 45 of the plunger is of reduced diameter and slidably fits in the guide 44. The lower end of the guide 44 forms a shoulder 46 within the working barrel adapted to be engaged by an external shoulder 47 on the plunger when the plunger is pulled upwardly above its normal workin stroke, thus to unseat the member 26 or 2 as the case may be, from the seat 25 when it is desired t0 withdraw the inserted portions of the ump or, as in some cases, raise the mem er- 26 from the seat'25 for washing out the sand from the pum A frictional lock is providbd to hold the working barrel in its seat 25 and this frictional lock may be of any suitable construction within the scope of the appended claims and, in this instance, is made asv follows: The upper end of the guide 44 is connected by screw-threads to a compressible expandible bushing or thimble 48 of tubular construction at its :ends and having any desired number of longitudinal resilient spring arms 49 connecting the tubular portions. The spring arms 49, when expanded, are accommodated in an enlargement 50 of the pump tubing, the inner face of the upper end of the enlargement constituting an upwardly and inwardly tapered shoulder 51 against which seats an upwardly and inwardly tapered shoulder or shoulders 52 on the arms 49. Thus the arms 49 yieldingly hold the Working barrel toward the pump seat 25 and the arms 49 will be compressed and disen aged from the shoulder 51 by raising the p unger to cause theshoulder 47 to engage and rais@ he shoulder 46.

The guide 44 constitutes the inner wall of a spring chamber 53, the outer wall of said spring chamber being formed by the pump tubing. Within the spring chamber' 53 is a coil sprinfr 54 seating at one end against an externa annular shoulder 55 on the guide 44, said shoulder being formed, in this instance, by the lower end of the thimble 48. The sprlng 54 may be and preferably is weaker than the spring 20, whlch is mainly relied upon to hold the thimble against the shoulder 51, and the lower end of the spring 54 bears against a wedge-shape packer 56 to press said packer into a downwardly and lflll inwardly tapered seat 57 formed in the pump tubing. This packer 56 serves to prevent the entrance of sand between the working barrel and pump tubing and thus any sand that may be present in the liquid being pumped wlll not prevent or make ditiicult the pulling of the working barrel from the pump seat. The packer 56 also functions to hold the guide 44 concentric with the working barrel so as to prevent lateral motion of the plunger adjacent the upper end of the working barrel, which lateral motion, as is well understood, would cause excessive wear of the upper end of said working barrel so that sand would be admitted between the working barrel and plunger and produce excessive friction and a grinding action capable of efecting relatively rapid deterioration of the pump.

The guide 44 is provided with an external annular shoulder 58 formed, in this instance, b v the upper end of the working barrel and adapted, when the working barrel is raised from its seat by raising of the plunger above its normal working stroke, to engage the packer 56 and force said packer out of engagement with its seat 57.

The pump described above may first be installed in a well without the upper standing valve and with the imperforate tubular member 27 in place, as in Figure 4 of the drawings. It will be seen that the tubular member 27 has a larger diameter of bore than the valve cage 30, thus providing for a relatively large flow of liquid through the lower standing valve and member 27 into the working barrel and thence into the ump plunger. This lower standing valve 1s, of course, not removable with the Working barrel, being unconnected therewith. Therefore, in event of the lower standing valve becoming sanded up, the working barrel will be withdrawn from the well and the tubular member 27 removed and the valve cage 30 and `its parts together with the perforate member 26 substituted for the tubular member 27 as in Figure 1, and the working barrel will then be lowered to seat the member 26 within the seat 25. as in Figure 1. The liquid being pumped can now readily enter the pump through the perforations 14 28.

lf the upper standing valve should sand up. the sand can be discharged or washed out of the pump by raising the pump plunger sniiiciently to cause disengagement of the member 26 from the seat 25, thus permitting the sand to discharge from the member 26 into the perforated portion of the pump tubing` thence through the perforations 14. As soon as the sand is thus discharged. the plunger will be lowered to permit the member 26 to again engage the seat 25. Seating of the member 26 may be insured by striking the lower end of the plunger against the shoulder 59 formed by the upper end of the Valve cage 30, and seating o the member 27 may be insured by forcing the lower end of the plunger against the shoulder 60 formed by the upper end of the member 27.

In some instances, it may be advisable to employ the pump in a well producing large amounts of gas as well as liquid, with both standing valves operating. In such event the gas and liquid will pass through the lower stan'din valve into the member 26 and the gas will escape, before reachin the upper standing valve, through the per orations 28 and 14. Thus the gas will not interfere, with proper seating of the upper standing valve and plunger valves.

I claim:

1. A ump comprising pump tubing havlng an internal shoulder, a standing valve cage provided with a valve and forming a seat, a spring between the cage and the shoulder, a working barrel, a tubular member connected with the working barrel and inserted in the seat, a friction lock between the working barrel and pum p tubing to hold the tubular member in its seat, and a valved plunger in the working barrel.

2. A pump comprising pump tubin having upper and lower internal shoul ers, a standing valve cage provided with a valve and forming a seat, a spring between the cage and the lower shoulder, a workin barrel, a tubular member connected wit the working barrel and inserted in the seat, a spring arm connected with the working barrel and engaging the upper shoulder to hold the tubular member in its seat` and a valved plunger in the working barrel.

3. A pump comprising pump tubing, a standing valve cage provided with a valve and forming a seat and mounted in the pump tubing, a working barrel, a tubular member connected with the working barrel and inserted in the seat, expandible means between the working barrel and-pump tubing to hold the tubular member in its seat, and a valved plunger in the working barrel.

4. A pump comprising pump tubing having an internal shoulder, a standing valve cage provided with a valve and forming a. seat and mounted in the pump tubing, a. working barrel, a tubular member connected with the working barrel and inserted in the seat, a spring' arm connected with the working barrel and engaging the shoulder to hold the tubular member in its seat, and a valved plunger in the `working barrel.

5. A pump comprising pumpV tubing, a`

seat-forming member mounted 1n the pum tubing, a standing valve cage provided wit a valve and mounted in the pump tubing above the seat. a working barrel connected with the valve`cage, a tubular member conA nec-ted with the standing valve cage and infittinin 8. pump comprismg serted in the seat, expansible means between the working barrel and pump tubing to hold the tubular member in its seat., and a valved plunger in the working barrel.

6. A vpump comprising pump tubing, a seat-forming member yieldingly mounted in the pump tubing, a standing valve cage provided with a valve and mounted in the ump tubingV above the seat, a working arrel connected with the valve cage, a tubular member connected with the standing valve cage and inserted in the seat, expansible meansbetween the working barrel and pump tubing to hold the tubular member 1n its seat, and a valved plunger in the working barrel.

7. A pump comprising pump tubing, a seat-forming member mounted in the um tubing, a standing valve ca providedpwit i a valve and mounted in t e pump tubing above the seat, a workin barrel connected with the valve cage, a tu ular member coni nected with the standing valve cage and inserted in the seat, a guide connected with the upper end of the working barrel of less inside diameter than the workin barrel,

(plunger fitting in t e workhaving a reduced portion and a valved ing barrel an the guide.

ump tubing, a standing valve mounted in t e pump tubing, a working barrel having a standing valve above the first standing valve, a tubular member inside of the pump tubing detachably connecting the standing valves, and a valved plunger in the working barrel.

9. A pump com rising pump tubing, a standing valve yie dingly mounted in the pum tubing and providing a seat, a working arrel having a standing valve above the first standing valve, the second standing valve bein detachably connected with the first standing valve, ex ansible means between the working barre and pump tubing.

to hold the second standing valve toward the first standing valve, and a valved plunger in the working barrel.

10. A ump comprising pump tubing, a working barrel in the pump tubing, a standing va ve in the pum tubing, a tubular guide connected with t e upper end of the working barrel of less inside diameter than said working barrel, a packer between the guide and pump tubing, an external shouli der on the guide below the packer to dislodge the packer when the working barrel is raised, and a valved plunger fitting in the working barrel and having a reduced portion fitting in the guide, and having an enlarged portion of material length fitting the working barrel below the reduced portion.

11. A pump comprising pump tubing having a perforate portion, a standing valve mounted in the pum tubing, a working barrel having a stan ing valve above the first standing valve, a tubular perforate member connected with both standing valves and extending through the perforate ortlon of the pump tubing, and a valved p unger 'in the working barrel.

12. A pump com rising pumlubing havlng a seat, a seatorming mem r mounted in the pum tubing, a working barrel in the pum tu ing, a standing valve cage having a va ve and connected with the working barrel, a tubular member on the valve cage engaging the last seat, a guide connected with the working barrel, a. acker between the uide and the pump tu ing, a. spring yiel ingly holdin the packer 1n the first seat, and a valve plunger slidably fitting in the working barrel andthe guide.

13. A pump comprising pump tubin having a seat, a seat-forming member yiei ingly mounted in the pump tubing, a working barrel in the pump tubing, a standing valve cage having a valve and connected with the working barrel, a tubular member on the valve ca e enga ng the last seat, a guide connecte with t e working barrel, a packer between the guide and the pump tubing, a spring yieldingly holding the packer in the first seat, releasable means to hold the working barrel against u ward movement, and a valved plunger s idably fitting in the working barrel and the guide.

14. A pump comprisin pump tubing having a seat, a standing va ve mounted 1n the pump tubing and providing a seat, a worklng arrel in the pump tubing, a tubular memberconnected with the working barrel and detachably enga ing the second seat, a guide connected wit the working barrel, a acker between the uide and the pump tu ing, a spring yie dingly holding the packer in the first seat, and a valved plunger sldably fitting in the working barrel and the gulde.

15. A pump comprising pum tubing hav ing a seat, a standing valve yiel ingly mounted in the pump tubin and providlng a seat, a working barrel in t e pump tubing, a tu bular member connected with the working barrel and detachably engaging the second seat, a guide connected with the working barrel, a packer between the guide and the pump tubing, a s ring yieldingly holding the packer in the rst seat, releasable means to hold'the working barrel against upward movement and a valved plunger slidably fitting in the working barrel and the guide.

,16. A ump comprising pump tubing` a working arrel detachably connected with the ump tubing, a standing valve below the worling barrel, a guide connected with the workin barrel, a valved plunger slidably fitting 1n the working barrel and guide, and a packer 'between the guide and pump tubing.

17. A pump comprising pump tubing hm. A i

ing a perforate portion, a seatforming member yieldin ly supported in the pump tubing, a wor mg barrel havin a standin valve, a tubular perforate mem er connec with. the standing valve and extending through the perforate portion of the pump tubin and detachably engaging the seat, a valve plunger in the working barrel, and packing means between the plunger and pum tubing above the perforate tubular mem r.

18. A pump comprising pump tubing having a seat, a seat-forming member mounted in the pump tubing, a working barrel in the pump tubing, a standing valve cage having a valve and connected with the working barrel, a tubular member `on the valve ca e engaging the last seat, a guide connecte with the working barrel, a acker between the guide and the pum tu in and a valved plunger slidably ttlng in t e working barrel and the guide.

1,9. A pump comprisin pump tubin having a seatz a standing va ve mounted inthe pump tubing and providing a seat, a working barrel 1n the pump tubing a tubular member connected with the worliing barrel and detachably engaging the second seat, a guide connected wlth the Working` barrel, a packer between the uide and the pump tubing, and a valved Fun er slidably fitting in the working barre an the guide.

20. A smtable pump comprising pump tubing having an internal seat and having a shoulder above the seat, a working barrel in the pump tubin ,Y a guide connected with the working barre a packer shiftably fitting the guide and ittin in the seat, expansible means connec with the guide and frictionally engagin the shoulder to hold the working barre and a valved plunger shiftably fitting in the working b arrel-and the ide.

21. A suitable pump comprising pump tubin having a seat and having an internal shoulder above the seat, a working barrel having a guide, a packer slidably fitting the guide an means connected with the ide and frictionally engaging the shoul er to hold the guide yieldmgly secured within the pump tubing, a plunger slidably fitting in the workin barrel and guide, and a valve for the wor in barrel.

22. A suitable pump comprising pump tubin having a seat and having an Internal shoul er above the seat, a working barrel having a valve connected therewith, a guide connected with the working barrel, a packer shiftably fitting the guide and detachably fittin in the seat, expansible means connected w1th the guide and frictionally engagin the shoulder to hold the working barre a ainst upward movement, a valved plunger slgidably fitting in the working barrel and engaglng the seat, expansible gu ment, a va ve connected with the working v barrel, and a valved plunger shiftably fitting in the working barrel and guide.

24. A pump comprising pump tubing having a seat and having an internal shoulder above the seat, a suitable working barrel within the pump tubing having a valve within the tubing, a tubular guide, a packer` shi tab y en agin the guide, a spring yieldingly hol ingl t e packer in the seat expansib e means connected with the gui e and frictionall engaging the shoulder to hold the wor ing barrel against u ward movement, and a valved plunger slidably fitting in the working barrel and the guide. 25. A suitable pump comprising pump tubin having a seat and having an internal shoul er above the seat, a seat-forming standing valve cage yieldingly mounted in the pump tubing and provided with a valve, there being a perforation in the pump tubing above the standing valve cage, a working barrel within the pump tubin having a valve, a tubular perforate mem' er connected with the last valve and with the standing valve cage and projecting into the perforate portion of the pum tubing, a guide connected with the wor ing barrel, a packer fitting the guide and detachably fitting in the, rst seat, expansible means connected with the guide Yand frictionally enga ing the shoulder, and a valved plungerds idably fitting the working barre and 1 e. 26S A suitable pump comprising pum tubing having a seat and an internal shou der, a suitable pumping mechanism in the pump tubing provided with a guide for the plunger, a packer slidably fitting the guide and detachably tting in the seat, and expansible means connected with the guid and frictionally engaging the shoulder to hold the guide and pumping' mechanism in place within the pump tubing.

27. A suitable ump comprising pump tubing having per orations, a working barrel in the pump tubing, a standing valve cage having a valve and connected with the working barrel, a perforate tubular member on the valve cage, a seat-forming member mounted in the pump tubing below the perforations and detachabl engaged by the tubular member, a gui e connected with the Working barrel, a packer between the guide and the pump tubing, suitable re- Aleasable means to hold the working barrel secured in the pump tubing, and a valved plunger slidably fitting the working barrel and guide.

28. A pump comprising pump tubing, a standing valve cage in the pump tubing hav ing a valve and providing a seat, a working barrel in the pump tubing, a tubular member connected with the Working barrel and rictionall engaging the seat, a guide connected with the Working barrel, and a valved plunger slidably fitting the Working barrel and guide.

29. A suitable pump comprising pump tubing having a seat and having perforations below the seat, a Working barrel in the pump tubing having a guidi, a packer slidably fitting the gu1de, a spring yie-,ldingly holding the acker friction-tight in the seat, a valved p unger slidably fitting in the working barrel and guide, and a valve for the working barrel Within the pump tubing.

30. A pump comprising pump tubing having a seat, a seat-forming member mounted in the pump tubing, a suitable working barrel in the pump tubing, a standing valve cage having a valve and connected with the Working barrel, a tubular member on the cage detachably engaging the last seat and connected with the working barrel, a guide connected with the working barrel, a packer between the guide and the pump tubing, a spring holding the packer in frictional engagement with the first seat, and a valved plunger slidably fitting the working barrel and guide.

31. A pump comprising pump tubing havA ing a seat and having a perforate portion below the seat, a seat-forming member mounted in the pump tubing below the perforation, a suitable working barrel, a stand ing valve cage for said working barrel pro vided with a valve, a tubular perforate mem ber connected with the standing valve cage and extending through the perfor-,ite portion of the pump tubing and in detaclmbhl relation with the seat-forming member, u tubular guide connected with the working barrel, a packer between the guide and pump tubing, a spring holding the packer in the first seat, and a valved plunger slidably fitting the working barrel and guide.

32. A suitable pump comprising pump tubing having a seat and having periorav tions below the seat, a standing valve cage provided with a valve and forming a seat and yieldingly mounted in the pump tubing below the perforations, a working barrel in the pump tubing having a guide, a packer slidably fitting the guide, a spring holding the packer friction-tight iu the first seal. a valved plunger slidably fitting in the working barrel and guide, and .1 standing valve cage connected with the working barrelv and having a valve and detachahly connected with the second seat.

Signed at Los Angeles, Cal., this '24th day of July, 1923.

JOHN HAHN. 

